DiamondView^(TM)下呈黄色荧光的天然钻石的FTIR光谱特征  

FTIR spectral characteristics of natural diamonds with yellow fluorescence viewed under DiamondView^(TM)

作　　者：刘培钧 王巨安 徐利强 邵惠萍 刘晋华 刘晓波[3] 严俊 

机构地区：[1]浙江方圆检测集团股份有限公司,浙江杭州310013 [2]浙江工业大学温州科学技术研究院,浙江温州325024 [3]北华大学机械工程学院,吉林吉林132021

出　　处：《安庆师范大学学报（自然科学版）》2017年第4期30-35,共6页Journal of Anqing Normal University(Natural Science Edition)

基　　金：浙江省质量监督系统科研计划项目(20130207;20170206)

摘　　要：利用傅里叶变换红外(FTIR)光谱结合钻石观测仪(DiamondView^(TM))、紫外-可见(UV-Vis)吸收光谱对在DiamondView^(TM)下呈现黄色荧光的天然钻石进行较系统的研究。结果表明:绝大多数在DiamondView^(TM)下呈现单一黄色或部分黄色荧光的天然钻石,其FTIR光谱中一般在1 282 cm^(-1)处有较强的吸收峰,因此,初步认为该类钻石晶格中的双N(N_2)即A中心是钻石呈现黄色荧光的形成机制之一。但同时发现少数荧光呈现黄色的钻石的FTIR谱图中缺失1282 cm^(-1)处的吸收,且对应样品的FTIR光谱中存在1 450 cm^(-1),处或UV-Vis吸收光谱中存在741nm的特征吸收,即该类钻石的黄色荧光可能是辐照所致。The formation mechanism of yellow fluorescence for natural diamonds viewed under DiamondViewTM are systematic investigated by Fourier transform infrared spectra （FTIR） combined with DiamondViewTM and UV-Vis-NIR absorption spectra. The results show that most of diamonds with yellow fluorescence or partly yellow fluorescence have an infrared absorption peak at 1 282 cm^-1 namely A center. It is deduced that the yellow fluorescence derived from the N2 optical center in the diamond lattice. Furthermore, a few of diamonds with yellow fluorescence have not the 1 282 cm^-1 absorption perk, but existed 1 450 cm^-1 in their corresponding FTIR spectra or 741 nm in their corresponding UV-Vis absorption ones. The yellow fluorescence observed in the DiamondViewTM can be produced by irradiation.

关 键 词：天然钻石 黄色荧光 光谱特征 形成机制 双氮 辐照 

分 类 号：O433.1[机械工程—光学工程] O433.4[理学—光学]